Double-section blanking screw

Abstract

A double-section blanking screw comprises a rod body and screw flights arranged on the rod body, the screw flights comprise a feeding section, a melting section and a discharging section, the feeding section is double screw flights capable of forcibly pushing materials forwards, the double screw flights are distributed on the circumference of the rod body at equal intervals, and the feeding ends of the double screw flights are connected with the rod body provided with a non-return groove. And the feeding position of the double-screw flight extends into the arrangement position of the non-return groove and is communicated with the non-return groove. Compared with the prior art, the double-screw-edge feeding device has the advantages that the feeding section adopts the double screw edges, the double screw edges start to extend from the position where the non-return groove is formed, a good material pushing effect is achieved, materials are forcibly pushed forwards, discharging of the materials is smooth, the ends of the double screw edges extend into the non-return groove, feeding of the materials is facilitated, and the discharging smoothness of the materials is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of extruder screw technical field, especially refer to a kind of double-section blanking screw. BACKGROUND

[0002] The utility model discloses a double-screw rib variable pitch screw, including: connecting section one, the one side of connecting section one is fixed with mixing section one, the one side of mixing section one is fixed with mixing section two, the one side of mixing section two is fixed with multi-start thread, the one side of multi-start thread is fixed with light rod section, the outside of light rod section is fixed with double screw rib, the outside of light rod section is fixed with single screw rib, the one side of light rod section is fixed with connecting section two. The utility model discloses through the design of multi-start thread, double screw rib and single screw rib, screw extruder can realize the compression and shunt effect of material, this compression and shunt mode helps to control the flow direction, speed and density of material, further optimizes the quality and shape of product, compact structure, stable work simultaneously, can guarantee continuous, efficient production process, and solve the problem that accurate control to material compression and shunt is difficult to realize. However, the material pushing force of the screw feeding section position still needs to be strengthened, and the material processing effect of the melting section also has room for improvement, so the structure of the screw still needs to be further improved. SUMMARY

[0003] The utility model provides a kind of double-section blanking screw for the above prior art status, and the technical problems to be solved are good material pushing effect, and the feeding of smooth.

[0004] The technical scheme adopted by the utility model to solve the above technical problems is as follows: the double-section blanking screw, including rod body and the screw rib being set on rod body, the screw rib includes feeding section, melting section and discharge section, characterized in that: the feeding section is the double screw rib that can forcibly push material forward, the double screw rib is equally spaced distributed on the circumference of rod body, and the feeding end of the double screw rib is connected with the rod body provided with check groove.

[0005] As an improvement, the feeding position of the double screw rib can be preferably extended into the setting position of the check groove and communicated with the check groove.

[0006] Further improvement, the screw rib width of the double screw rib can be preferably kept unchanged, and one screw rib in the double screw rib is connected together with the screw rib smooth transition of the melting section.

[0007] Further improvement, the melting section can preferably include melting section one and melting section two, the melting section one is single screw rib, and the melting section one is connected together with one screw rib in the double screw rib.

[0008] Further improvement, the rod body corresponding to the melting section can preferably comprise a tapered section with a small diameter at one end and a large diameter at the other end and a cylindrical section with the same diameter at both ends, the tapered section corresponding to the first melting section, and the cylindrical section corresponding to the second melting section.

[0009] Further improvement, the second melting section can preferably be a single helical rib, the second melting section and the first melting section being connected together in sequence, and an auxiliary helical rib being arranged on the rod body corresponding to the second melting section, the helical rib spacing between the auxiliary helical rib and the second melting section gradually increasing.

[0010] Further improvement, the starting position of the auxiliary helical rib can preferably be connected to the second melting section, and a connecting protrusion capable of acting as a material barrier being arranged between the starting position of the auxiliary helical rib and the second melting section.

[0011] Further improvement, the side wall of the connecting protrusion can preferably be a slope surface capable of smoothly transitioning with the surface of the rod body.

[0012] Further improvement, the discharging section can preferably also be a single helical rib, the discharging section and the second melting section being connected together in sequence.

[0013] As an improvement, the end of the rod body can preferably be provided with a gear body.

[0014] Compared with the prior art, the advantages of the utility model lie in that the feeding section adopts double helical ribs, and the double helical ribs start extending from the position of the check groove, have good material pushing effect, forcibly push the material forward, make the material discharge smoothly, the end of the double helical rib extends into the check groove, facilitates material feeding, and further increases the smoothness of material discharge; the melting section increases the auxiliary helical rib, also plays the role of increasing the pushing force, makes the solid of the surface layer locally melted be strongly extruded to the liquid phase groove by the helical groove rotation direction, while the volume of the liquid phase groove continuously increases, and the volume of the solid phase groove continuously decreases and is extruded, forms heat alternation, improves the material melting effect, and the connecting protrusion is arranged, plays the barrier effect between the feeding section and the melting section, reduces the backflow of the material, and better forcibly pushes the material forward. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a perspective view of the utility model embodiment;

[0016] Figure 2 It is a front projection view of Figure 1 ; It is a sectional view along line A-A in ; It is a sectional view along line B-B in

[0017] ; It is an enlarged view of I part in Figure 3 ; It is an enlarged view of II part in Figure 2 ; It is an enlarged view of III part in ; It is an enlarged view of IV part in

[0018] ; It is an enlarged view of V part in Figure 4 ; It is an enlarged view of VI part in Figure 2 ; It is an enlarged view of VII part in ; It is an enlarged view of VIII part in

[0019] Figure 5 is Figure 3 is DETAILED DESCRIPTION

[0020] The utility model will be described in further detail below in connection with the drawings.

[0021] As Figures 1 to 5 shown, the double-section feeding screw of the embodiment includes a rod body 1 and screw ribs arranged on the rod body 1, the screw ribs include a feeding section A, a melting section B and a discharging section C, the feeding section A is a double screw rib capable of forcibly pushing forward the material, the double screw ribs are equally spaced on the circumference of the rod body 1, and the feeding ends of the double screw ribs are connected with the rod body 1 provided with a check groove 11. The feeding position of the double screw rib extends into the setting position of the check groove 11 and is connected with the check groove 11. The screw rib width of the double screw rib remains unchanged, and one screw rib of the double screw rib is connected with the screw rib of the melting section B in a smooth transition.

[0022] The melting section B includes a melting section B1 and a melting section B2, the melting section B1 is a single screw rib, and the melting section B1 is connected with one screw rib of the double screw rib in a head-to-tail connection. The rod body 1 corresponding to the melting section B includes a conical section with a small diameter at one end and a large diameter at the other end and a cylindrical section with the same diameter at both ends, the conical section corresponds to the melting section B1, and the cylindrical section corresponds to the melting section B2. The melting section B2 is a single screw rib, and the melting section B2 is connected with the melting section B1 in a head-to-tail connection, an auxiliary screw rib 12 is arranged on the rod body 1 corresponding to the melting section B2, and the screw rib spacing between the auxiliary screw rib 12 and the melting section B2 gradually increases. The starting position of the auxiliary screw rib 12 is connected with the melting section B2, and a connecting protrusion 13 capable of acting as a material barrier is arranged between the starting position of the auxiliary screw rib 12 and the melting section B2. The side wall of the connecting protrusion 13 is a slope surface capable of smoothly transitioning with the surface of the rod body.

[0023] The discharging section C is also a single screw rib, and the discharging section C is connected with the melting section B2 in a head-to-tail connection. The end of the rod body 1 is provided with a gear body 14.

Claims

1. A two-stage feeding screw comprising a screw body (1) and screw flights provided on the screw body (1), the screw flights comprising a feeding stage (A), a melting stage (B) and a discharging stage (C), characterized in that: The feeding section (A) is a double screw ribbon which can push the material forward forcibly, the double screw ribbons are distributed on the circumference of the rod body (1) at equal intervals, and the feeding ends of the double screw ribbons are connected with the rod body (1) provided with the check groove (11).

2. The twin-zone material feed screw of claim 1, wherein: The feeding position of the double screw ribbon extends into the setting position of the check groove (11) and communicates with the check groove (11).

3. The twin-zone material-depositing screw of claim 2, wherein: The screw ribbon width of the double screw ribbon remains unchanged, and one screw ribbon in the double screw ribbon is connected with the screw ribbon of the melting section (B) smoothly at the head and tail.

4. The twin-zone material-depositing screw of claim 3, wherein: The melting section (B) comprises a melting first section (B1) and a melting second section (B2), the melting first section (B1) is a single screw ribbon, and the melting first section (B1) is connected with one screw ribbon in the double screw ribbon at the head and tail.

5. The twin-zone material-depositing screw of claim 4, wherein: The rod body (1) corresponding to the melting section (B) comprises a conical section with a small diameter at one end and a large diameter at the other end and a columnar section with the same diameter at two ends, the conical section corresponds to the melting first section (B1), and the columnar section corresponds to the melting second section (B2).

6. The twin-zone material-depositing screw of claim 5, wherein: The melting second section (B2) is a single screw ribbon, the melting second section (B2) is connected with the melting first section (B1) at the head and tail, and an auxiliary screw ribbon (12) is arranged on the rod body (1) corresponding to the melting second section (B2), and the screw ribbon spacing between the auxiliary screw ribbon (12) and the melting second section (B2) gradually increases.

7. The twin-zone material-depositing screw of claim 6, wherein: The starting position of the auxiliary screw ribbon (12) is connected with the melting second section (B2), and a connecting protrusion (13) which can play a material barrier role is arranged between the starting position of the auxiliary screw ribbon (12) and the melting second section (B2).

8. The twin-zone material-depositing screw of claim 7, wherein: The side wall of the connecting protrusion (13) is a slope surface which can smoothly transition with the surface of the rod body.

9. The twin-zone material-depositing screw of claim 6, wherein: The discharging section (C) is also a single screw ribbon, and the discharging section (C) is connected with the melting second section (B2) at the head and tail.

10. The twin-section material-feeding screw as claimed in any one of claims 1 to 9, characterized in that: The end of the rod body (1) is provided with a gear body (14).

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